Hair clipper plate grinder



July 2, 1957' B. A. ROUSE 2,797,534

HAIR CLIPPER PLATE GRINDER Filed 001;. 223 1954 2 Sheets-Sheet 1 Bryan!A Rouse IIYVENTOR.

-B. A. ROUSE HAIR CLIPPER PLATE GRINDER .July 2, 1957 2 Sheets-Sheet 2Filed Oct. 27, 1954 Bryamf A. House INVENTOR.

2,797,534 HAIR CLIPPER PLATE GRINDER Bryant A. Rouse, Lawton, Okla.Application October 27, 1954, Serial No. 465,029 1 Claim. (Cl. 51-122)The present invention relates to grinding machines for grinding metalwork pieces, and more particularly relates to a device specificallyadapted for the grinding of the clipper plates of barbers clippers andthe like.

The primary object of the invention is in the provision of a grindingmachine for grinding the clipper plates from hair clippers in such amanner that these plates are provided with smooth edges with no burrsbeing formed on the teeth thereof.

Generally, the invention comprises a flat surfaced grinding disk drivenby a center shaft and having a reciprocatory arm carrying a work holderin overlying relationship thereto with a linkage interconnecting theshaft and the reciprocatory arm whereby the work holder is reciprocatedacross the face of the grinding disk as the grinding disk is rotated,thereby grinding the surface of the clipper plate held by the workholder. In order to maintain an even tension on the work holder so thata clipper plate may be held between the work holder and the grindingplate without slippage, resilient means is provided yieldingly urgingthe reciprocatory arm toward the face of the grinding disk.

A highly important object of the invention is in the provision of anovel work holding element and supporting arm which forms thereciprocatory arm of the device whereby the work holders may be easilyinterchanged to fit clipper plates of various manufacture.

These, together with other objects and advantages which will becomesubsequently apparent, reside in the details of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming a part hereof, whereinlike numerals refer to like parts throughout, and in which:

Figure 1 is a perspective view of the grinding machine of the presentinvention;

Figure 2 is a vertical cross-sectional view through the machine;

Figure 3 is a horizontal cross-sectional view taken substantially alongthe plane of section line 33 of Figure 2;

Figure 4 is an enlarged detail view of the work holder and itssupporting arm disclosing the operation thereof constituting a part ofthe invention;

Figure 5 is an exploded view of a work holder and a clipper plate; and

Figure 6 is an exploded view of a second type clipper plate and workholder.

Referring now to the drawings in detail, the grinding machineconstituting the invention is designated in its entirety by the numeral10 and is seen to comprise a substantially rectangular housing having atop 12, sides 14 and 16 and a bottom 18.

Vertically journaled within the housing is a center shaft 20 having itsupper end projecting through the top 12 thereof. Fixedly attached to theexteriorly projecting upper end of the center shaft 20 is a flatsurfaced grinding disk 22, the center shaft 20 constituting a drivingshaft for this disk. Mounted on the center shaft 20 within the housingis an enlarged pulley wheel 24.

Patented July 2, 1957,

Mounted preferably on the side 14 of the housingis a suitable electricmotor or the like 26 having a small pulley wheel 28 fixedly attached tothe projecting portion of the drive shaft 30 thereof. Endless belt 32 isentrained over the pulleys 24 and 28 through a suitable slot 34 in theside wall 14 of the housing so that upon operation of the motor 26, thecenter shaft, and consequently, the grinding disk 22 will be rotated.

A suitable electric cord 36 leads from the motor 26 to a source ofcurrent, a switch 40 being interposed between the attachment of the cord36 to the motor 26 and the source of electrical current. Conveniently,this switch is mounted on the side wall 14 of the housing beneath themotor 26 in order that the motor may be turned on and off at thehousing.

Mounted on the center shaft 20 in fixed relation thereto below thepulley 24'is an eccentric 42 being formed with an annular channel 44around the periphery thereof. A pitman 46 has an eye 48 formed at oneend thereof loosely received within the annular channel 44 of theeccentric 42.

Mounted on wall 16 of the housing and projecting within the housing is arocker arm 52. T

A suitable fastener 54 extending loosely through the free end of thepitman 46 and the lower end of the rocker arm 52 operatively connectsthese two members to one another. Intermediate its ends, the rocker arm52 is attached pivotally to thebracket 5!) by means of a suitablepivot56.

The upper end portion'of the rocker arm 52 projects through the top 12of the housing.

To the upper end of the rocker arm 52 is pivotally secured by means ofthe pivot 58 the outer end of a supporting or reciprocatory arm 60. j

The inner end of the arm 60 overlies the face of the grinding disk 22and is provided with a vertical bore or aperture 62 therethrough. Arotatable work holder 64 is guidingly retained in the passage 62 withthe head 66 of the holder guidingly retaining the work piece 68 incontact with the face of the grinding disk 22.

In order to maintain an even pressure on the work holder 64, a suitableresilient spring 70 is detachably secured at its upper end to adownwardly projecting lug 72 depending from an intermediate portion ofthe reciprocatory arm 60. The lower end of the spring 70 is connected tothe bracket 50 whereby the work holder 64 is constantly urged toward theface of the grinding disk 22.

Although the clipper plates of all hair clippers are substantiallyidentical, the manner in which they are mounted on the clipper headsvaries somewhat and consequently, the supporting arm construction 60 andthe work holder construction 64 are constructed in order to be generallyusable with all type clipper plates.

To this end, the spring 70 may be simply detached from the lug 72,asnoted in Figure 4, and the supporting arm 60 pivoted upwardly aboutits pivot 58.

Also, adjacent its outer end, the supporting or reciprocatory arm 60 isprovided with an undercut notch 74 into which the lower end of the bore62 opens.

In all forms of the invention, the work holder 64 comprises an elongatedstem or shank 76 which is guidingly retained within the bore 62 and ahead 78 which seats within the notch 74 to prevent rotation of the stemof the holder within the bore 62.

In general, there are two types of mounting for the clipper plates ofhair clippers, the clipper plates themselves being suitably apertured orslotted in order to adapt them to mounting on their heads.

Two types of such clipper plates are set forth in Figures 5 and 6 alongwith work holders having heads a suitable bracket 50 attached to theside.

modified to take advantage of the mounting apertures of the plates. InFigure 5, the clipper plate is shown as having an enlarged polygonalslot 80 in the head behind the teeth thereof, the clipperplate itselfbeing designated by the numeral 82. p

In order to accommodate the machine to the grinding of such plate, thehead 78 of the workholder 64 is provided with a projecting boss 84at thelower end thereof which conforms to the shape of the slot 80 in ,thehead of the clipper plate 82 whereby, as will be noted in Figure 2, theclipper plate may be held firmly and reciprocably on the face of thegrinding plate 22.

In Figure 6, the clipper plate is designated by the numeral 86 and hasthree spaced apertures 88 in the head thereof.

The work holder 64 has welded or otherwise suitably secured to thebottom surface of the head 78thereof,(note particularly Figure 4) asubstantially flat'plate 90.

Projecting from the undersurface of this plate at longitudinally spacedpoints therealong adjacent the rear. edge thereof are a pairlof lugs orbosses 92 so spaced to fit in the endmost apertures 88 of the head 86.Intermediate the front and rear edges of the flat plate 90 andprojecting from the undersurface thereof is a protuberance in the shapeof an elongated bar 94 which engages a portion of the clipper plate 86between the apertures 88 thereof.

and the ends of the teeth 96 thereof so that when the work holder ismounted to hold the clipper plate 86 in place, as shown in Figure 4, theteeth 96 of the plate are maintained in the proper engagement with theface of the grinding disk 22.

In the operation of the device, upon rotation of the center shaft 20,the pitman 46 is oscillated, rocking the rocker arm 52 and consequently,reciprocating the reciprocatory arm 60 and moving the work holder 64across the face of the grinding disk 22.

To change from one type work holder 64 to a second type work holder, itis only necessary to detach the spring 70, as shown in Figure 4, liftthe reciprocatory arm 60 and change holders.

From the foregoing, the construction and operation of the device will bereadily understood andfurther explanation is believed to be unnecessary.However, since numerous modifications and changes will readily occur tothose skilled in the art, it is not desired to limit the invention tothe exact construction shown and described, and accordingly, allsuitable modifications and changes may be resorted to, falling withinthe scope of the appended claim. I

What is claimed as new is as follows:

A device for grinding the clipper plates from barbers clippers and thelike comprising a housing, a center shaft journaled in said housing andhaving one end thereof projecting through the top of said housing, agrinding disk fixed to said one end of said shaft, means for rotatingsaid shaft operatively connected therewith and including an eccentricsecured to said shaft, a pitrnan mounted on and actuated by saideccentric, a bracket secured to said housing, a rocker arm pivotallysecured intermediate its ends within said housing and to said bracket,the lower, end of said rocker arm being attached to said pitman, theupper end of said rocker arm projecting through the top of said housing,a reciprocatory arm having one end-thereof attached to the upper end ofsaid I rocker arm, the other end of said reciprocatory arm overlyingsaid disk and having a vertical passage therethrough, a work holderguidingly retained in said passage, a spring secured to saidreciprocatory arm and to said bracket normally urging said arm with saidwork holder toward said disk while a work piece is reciprocated by saidarm over the face of the disk upon rotation of said shaft, said housinghaving side walls to one of which said bracket is secured, another ofsaid side walls having a slot, a motor mounted on said another of saidside walls, a driving connection between said motor and said shaft, andcontrol means for the motor operatively connected therewith.

References Cited in the file of this patent UNITED STATES PATENTS

